broadening its examination of a case that could end the practice of race-based affirmative action in education. the justices heard arguments over a michigan effort to ban conversation of race in college admissions. the court is already considering a 2008 challenge to the university of texas affirmative action program. the court today said it would combine the michigan and texas cases. >>> a ribbon-cutting ceremony got underway about an hour ago for the opening of the long awaited new twin tunnels bipatsing the problem-prone highway at devil slide. alex joins us live from san mateo county where residents there have been waiting decades for the new tunnels. >> reporter: one of the speakers today called this one of california's newest landmarks. you can see behind me here this is one of the two brand new tunnels that will take drivers around that notorious section called devil's slide. this event is still going on. the ribbon-cutting hasn't taken place yet but the tunnels will soon be officially untunnel is california's latest golden gate bridge. it's the transportation improvement that nearly ev